package com.heima.admin.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.core.toolkit.Wrappers;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.heima.admin.mapper.AdChannelMapper;
import com.heima.admin.service.AdChannelService;
import com.heima.model.admin.dtos.ChannelDTO;
import com.heima.model.admin.pojos.AdChannel;
import com.heima.model.common.dtos.PageResponseResult;
import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Service;

import java.util.Date;

/**
 * @author zx
 * @date 2021/11/16 12:20
 */
@Service
public class AdChannelServiceImpl  extends ServiceImpl<AdChannelMapper, AdChannel> implements AdChannelService {

    /**
     * 根据名称分页查询频道列表
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findByNameAndPage(ChannelDTO dto) {
        //1.参数检测
        if(dto==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //分页参数检查
        dto.checkParam();
        //2.按名称模糊分页查询
        Page page = new Page(dto.getPage(),dto.getSize());
        LambdaQueryWrapper<AdChannel> lambdaQueryWrapper = Wrappers.lambdaQuery();
        if(StringUtils.isNotBlank(dto.getName())){
            lambdaQueryWrapper.like(AdChannel::getName,dto.getName());
        }
        // 添加排序
        lambdaQueryWrapper.orderByAsc(AdChannel::getOrd);

        IPage result = page(page, lambdaQueryWrapper);
        //3.结果封装
        ResponseResult responseResult =
                new PageResponseResult(dto.getPage(),dto.getSize(),result.getTotal());
        responseResult.setData(result.getRecords());
        System.out.println("查询成功");
        return responseResult;
    }

    /**
     *新增频道
     * @param adChannel
     * @return
     */
    @Override
    public ResponseResult insertAdChannel(AdChannel adChannel) {
        // 1 参数校验
        if (adChannel == null || StringUtils.isBlank(adChannel.getName())) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }
        //2.长度判断
//        if (adChannel.getName().length()>10){
//            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID,"名称不能超过10个字");
//        }
        // 3 判断该频道是否存在
        int count = this.count(Wrappers.<AdChannel>lambdaQuery()
                .eq(AdChannel::getName, adChannel.getName()));
        if(count > 0){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST,"该频道已存在");
        }
        // 4 执行新增
        adChannel.setCreatedTime(new Date());
        save(adChannel);
        System.out.println("插入成功");
        // 5 返回结果
        return ResponseResult.okResult();
    }


    /**
     * 修改频道
     * @param adChannel
     * @return
     */
    @Override
    public ResponseResult updateAdChannel(AdChannel adChannel) {
        //1 参数校验
        if (adChannel == null || adChannel.getId() == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //2 执行修改
        AdChannel channel = getById(adChannel.getId());
        if (channel == null) {
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST,"频道信息不存在");
        }
        //3. 校验名称唯一性
        if(StringUtils.isNotBlank(adChannel.getName())
                &&
                !adChannel.getName().equals(channel.getName())){
            int count = this.count(Wrappers.<AdChannel>lambdaQuery()
                    .eq(AdChannel::getName, adChannel.getName()));
            if(count > 0){
                return ResponseResult.errorResult(AppHttpCodeEnum.DATA_EXIST,"该频道已存在");
            }
        }

        updateById(adChannel);
        System.out.println("修改成功");

        //4 返回结果
        return ResponseResult.okResult();
    }


    /**
     * 删除频道
     * @param id
     * @return
     */
    @Override
    public ResponseResult deleteById(Integer id) {

        //1.检查参数
        if(id == null){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //2.判断当前频道是否存在 和 是否有效
        AdChannel adChannel = getById(id);
        if(adChannel==null){
            return ResponseResult.errorResult(AppHttpCodeEnum.DATA_NOT_EXIST);
        }
        // 启用状态下不能删除
        if (adChannel.getStatus()) {
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_REQUIRE);
        }
//         int i = 1 / 0;
        //3.删除频道
        removeById(id);
        System.out.println("删除成功");
        return ResponseResult.okResult(AppHttpCodeEnum.SUCCESS);
    }

}